From the O2 web site:
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Xda Exec ROM - the Xda Exec System Software
The latest Xda Exec System Software is available for you
to download. New and changed in this version of software, v1.30.162 are:
Microsoft AKU 2 (Adaptation Kit Update) featuring:
- Microsoft Messaging and Security Feature Pack (MSFP)*
allowing Direct Push Email, Wireless Calendar, Contacts, Tasks, Global Address List
(GAL) Lookup and Security Policies.
* Requires organisations to be running Microsoft Exchange
Server 2003 and SP2. Please contact your company IT Manager to confirm your infrastructure
and for assistance with setting up your device for direct push email.
- Updated Comm Manager, providing new buttons for controlling
Direct Push Mail and active Data connections.
- Updated Radio v1.09.00
- Updated CE image v1.30.107
This software is for Xda Exec in UK and Ireland.
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I have diverted my mobile to landline as I won't be able to answer calls
while my phone is going through the update process!